The valve was replaced only just yesterday. I have realised myself that the plumbers haven't checked the pressure at the point where hot water leaves the cylinder (just before the valve), but surely if the valve is new and the pressure is poor just after the valve, the problem should lie inside...
Hi, this is the first time I'm having to deal with a water problem myself, so apologies if my description of the problem is slightly confusing...
Basically, it's a flat with an immersion heater/hot water cylinder (no gas in the building), fed by single mains cold input (15mm) coming down from...